Tracker-bar and music-sheet mechanism.



W. J. KEELEY.

TRACKER BAR AND MUSIC SHEET MECHANISM.

APPLICATION FILED JULY 14, 1906. RENEWED AUG. 24, 1908. 7 902,495. Patented Oct. 27, 1908.

ILL AM JIK L Y, or Newman, N. -Y., AssrGNon TO THE AUTOPIANO co on NEW YORK,

I I N. Y., conromrron on NEW YORK.

" anaemia-BAR Ann MUSIC-SHEET MECHANISM.

" Specification ofLetters Patent.

Patented 0a. 27, 1908.

Application filed July 1.4, 1906, Serial rim 326,190; Itenewed August 24, 1908. Serial No. 450,053.

To all whom'it may concern:

Be it known that I, WILLIA J. KEELEY, a

' citizen of the United States, residing at New York, in the county of New York and State of New York, have invented 'a new and use ful Tracker-Bar andMusic-Sheet Mechanism, of which the following is a specification.

My invention relates to music playing instruments and attachments in which a dou-' ble tracker-bar is provided, or a pair of tracker-bars having two sets of channels of different range.

The principal objects of my invention are to provide means whereby a simultaneous closing of one set of channels and opening of the other can be provided for in such a way that'the music sheet can operate from'the open one in the usual way, and also to provide for so manipulating the music sheet as to cause. it to operate across the surface of the tracker-bar or bars so as to cover either.

one of the sets of perforations. I have provided for accomplishing 'these obje'ctsin a simple, eflicient and convenient 'mannen without the employment of complicated and I expensive mechanism.

Reference is to be had to the accompany- Ithas heretofore been proposed to con-' struct a tracker bar with two sets of channels, and to' provide means for closing one channel, and independent means forclosing the other, the music-sheet ordinarily passing over both sets. It has also been proposed to provide movable tracker-bars for similar purposes.

In order to do away with certain complications which arise under such constructions, and to provide simplicity of operation, and especially to secure the automatic closin of one set of channels when the other is opened,

both operations being performed by one motion, I have provided a double tracker-bar,

or a pair f tracker-bars with two sets of channels or conduits 10 and 11, one set pref erably comprising the ordinary number of channels now used on most instruments of The tracker-bar '14 in which the channels are located is preferably mounted in stationaryv position.- Y

, The two sets of channels may beconnected by a seriesof stationary tubes 16 extending outside the tracker-bars, these tubes either being connected across from one set of channels directly to the'other, or from the tubes cated in dotted lines in Fig. 3.

'65 nary tubes 13, preferably fixed in stationary position with the several primary pneumatics.

.13 to the. opposite set ofchannels, as indi- In either case the two sets of channels are' intended to be alternately opened and closed by means of I ed them onslides 19 mounted to move in guide-ways 20. Each cap-plat'eis provided with an extension 21 )ro'ectin outwardl" I l a .Y

from its pivot point andoperated upon by a spring 22 mounted on the slide. The operation of the spring is to force the cap-plate inwardly, as shown at the left of Fig. .2 to cover the perforations when the slide is in a proper position therefor. \Vhen the slide is drawn down as shownmn the other-side, the spring is contracted -and ready to force the cap-plate back into position npon the 1'ecip1' -catioi1-of the slide. a

The two slides or other guides for manipulating the c'applates are preferably operated by the same means to withdraw one when the other is applied. In the construction illustrated I have employed a simple lever 23 for accomplishing this result. This lever is piv oted between the slides an'd'is provided with an adjustable connection with each, slide on opposite sides of its pivot, and-may also be provided with a handle 24 or other means to enable the operator to manipulate it. It will .be observed that the swinging of this lever to its limit in-either direction will causeone of this character, and the other comprising a thcap-plates to swing over its series of chani them a sufficient distance toxpermit t e mu sic-sheet to be applied to the open set, only one motion being necessary to apply one cap-' plate and withdraw the other.

For the purpose of permitting the use of a tracker-bar of the ordinary shape, and in the ordinary position, I have provided means whereby the music-sheet itself, may be Inanipulated so that in one position of the cap plates the'music-sheet will cover the open.

channels on one side, while in the other position it may be made to co er the open chan or this purpose a pivoted frame is employed. This frame is provided with bearings upon which the two roller shafts 26 are mounted, these shafts passing through the side of the case and working in slots 27 therein. The shafts 26 carry the music-sheet rollers in the ordinary u ay, and it will be obvious that by the swinging of the frame 25 about its pivot the rolls can be moved from the position shown in full lines to that shown in dotted lines, so as to bring the music-sheet into either of the desired positions.

' For the purpose of holding the rollers in either of their adjusted positions a fastenin means may be provided. I'have shown a stu 28 projecting inwardly from one of thebars 25 and passing through a slot 29 in the case,

- a thumb-nut 30 being provided for securing -stood.-

the parts in their 'adjustedpositions.

From the description above given the operation of the parts will be readily under- VVhile I have illustrated and described a particular form in which I prefer to embody my invention, I am well aware that -many modifications-'may be made; therein by any person skilled in the art without departing from the scope of my invention as expressed in the claims. I do not wish, therefore to be limited to the particular construction dis closed, but p What I do claim and desire to-secure by Letters-Patent is 1. A tracker-bar having-two sets of air conducting conduits opening in one face thereof, and a se ies of connecting channels located entirely Within the bar and extending directly from one set of conduits to the other.

2. A tracker-bar having two sets of air conducting conduits opening in one face of the bar, one set containlng a larger number of conduits than the other, and a series of channels located entirely within the bar and extending directly from each one of the smaller sets of channels 'to'one of the channels in the larger set.

3. In a music playing device, the combination of a tracker-bar having two sets of tracker-bar conduits, channels entirely within the tracker-bar connecting the conduits of on'eset with the conduits of the other set, and a single means for simultaneously closing the 0 en ends of one set of conduits and open ing t 1086 of the other.

4. I11 a music playing device, the. com bination of two sets of tracker-bar conduits, cap-plates, one for covering each set of conduits, and means connected with both of said cap-plates for simultaneously withdrawing one cap-plate and moving the other capplate in positionto cover the conduits of one set.

5. In a music playing device, the combination of a plurality of sets of tracker-bar conduits, a corresponding number of capplates, and a single means connected with each of said'cap )lates for simultaneously moving one cap-plate over one set of con duits, andwithdrawing another cap-plate from another set of conduits.

6. In a music playing device, the combination oftwo sets of tracker-bar conduits, a cap-plate for each set, a slide upon which each cap-plate is pivotally mounted, and means for simultaneously moving one slide toward the open ends of. the conduits and withdrawing the other therefrom.

7. In a'music playing device, the combination of two sets of tracker-bar conduits,

-a cap-plate for each set, a slide upon which each capplate is pivotally'mounted, means for simultaneously moving one slide toward the open ends of the conduits and withdrmving the other therefrom. and means for simultaneously swinging the cap-plate which is moved toward the conduits into position over their open ends.

8. In a music playing device, the combination of a tracker-bar having two series of conduits, a pair of cap plates, one for each series, a pair of slides on which said cap plates are pivotally mounted, each cap-plate having an arm extending to the rear of its pivot, a pair of springs mounted on'said slides for engaging said arms and normally forcing said cap-plates toward the trackerbar, and a lever pivoted between the slides and. connected therewith for simultaneously moving the slides in opposite directions.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

. WM. J. KEELEY. [L. s.] Witnesses:

CHAs. KOHLER, THOMAS DANQUARD. 

